Tomstrad "Goldilocks" Fire Door Gap Gauge, 2-4mm, Compliance Checking Tool for Fire Doors [2 pieces]

• COMPLIANCE CHECKING: Check your fire doors meet the required 2–4mm gap tolerance for UK fire safety regulations.
• PRECISE MEASUREMENT: The gauge quickly checks both the minimum 2mm and maximum 4mm gap limits around fire doors.
• EASY TO USE: Simply insert the gauge into the door gap to check whether the clearance is within the compliant range.
• STURDY CONSTRUCTION: Compact and robust tool built to withstand repeated use during fire door inspections and surveys. Made from solid plastic (not 3D printed)
• PORTABLE DESIGN: Lightweight and pocket-sized, making it ideal for fire door inspectors, contractors, and facilities managers on site. Hole allows tool to be hung or a hook or added to a keyring.

This Goldilocks Gauge is the perfect handheld tool for checking whether the gap around your fire door is "Too big" (greater than 4mm), "Too small" (less than 2mm) or "Just right" (2–4mm). Simply insert the gauge into the gap at the top and sides of your doors, then read the markings to check whether the gap is within the recommended range. The tool is roughly the size of a credit card, making it ideal for keeping in your pocket or toolbox. The hole allows it to be attached to a key ring or hung on a hook for easy access. Maintaining the correct gap around fire doors is essential to help ensure they operate as intended in the event of a fire. If the gap is too large, fire or smoke may pass through. If the gap is too small, the door may not close properly. This tool helps you check gaps in line with BS 8214 and the Fire Safety (England) Regulations 2022 — helping you get the gap “just right” every time.